i want to implement a vibration sensor that has a amgnet attached ona spring and a coil that gets the magnetic flux change converted to current. and then the current is amplified and a relay is switched... but i cant find the coil and the magnet piar anywhere from internet... i dont know what is this components special name etc.. but i have some oics that i would share if some one knows the name or some supplier plz tell me its name or from where can i buy this, the blue one is a coil .

 

What you are looking for is part of a 'fence vibration(shaker) sensor'. But like you I couldn't find the sensor pair by it self. Always part of the full system, sensor pair, amplifier and detection panel.

Maybe check with a alarm installer to find parts.

 

Attach a small mass to the cone of a small loudspeaker.

 

mass on top of a piezo block ...knock sensor from a car ...